Lock



Sept. 27, 1938. J. G. DUNSEATH `2,131,315

y LOCK Filed DeC. 7, 1937 Patented Sept. 27, 1938 i UNITED STATES PATENT oFFlcE LOCK James Gordon Dunseath, Reno, Nev., assignor of one-half to Harry Dunseath, Reno, Nev.

Application December 7, 1937, Serial No.` 178,579

1 claim. (ci. 70-905 Y The present invention relates to new and use- Figure V12 is any elevational view of a portion ful improvements in locks particularly for the of the key. sliding doors of show cases although it will be Referring now to the drawing in detail, itwi11 understood, of course, that the invention may be seen that the reference numeral I designates a be used for any purpose for which it may be portion 0f a ShOW CaSe COmDliSing Sliding doors found adapted and desirable, 2 and 3. The doors 2 and' 3 include inneriand The primary object of the invention is to proouter vertical meeting rails 4 and 5, respectively. vide, in a manner as hereinafter set forth, a lock YlViOllnieli in the Outer meeting Teilv 5 Vfind eX- of the aforementioned character comprising tending therethrough is a metallic barrel'. l-The means for positively securing the show case doors Outer end DOiiiOn 0f the bOIe 'l 0f the barrel 6 is in closed position, said lock further including counterbored, as at 8. The reference numeral 9 what may be referred to as e key plug which is designates diametrically opposite grooves which adapted to be removed when not in use, extend longitudinally in the bore 'l and which Other objects of the invention are to provide a communicate with the counterbore 8. Fixed on look of the character described which will be the inner end 0f the barrel 6 is a metallic plate 15 comparatively simple in construction, Strong, I0 which is recessed in the inner face of the meetdurable, highly efficient and reliable in use, coming rail 5 and Secured illeleO by SCI'eWS llpaet and which may be manufactured ai; 10W The plate I0 has formed therein an opening I2 cost, which is aligned with the bore 'I of the barrel 6 A11 of the foregoing and stili further objects and into which anees I3 extend, said flanges 20 and advantages of the invention will become ClOSing the inner ends 0f the gIOOVeS 9. This is apparent from a, study of the following specishown to advantage in Figs. 3 and 7 of the drawcation, taken in connection with the accomingpanying drawing wherein like characters of MOilnieCl in the inner meeting rail 4 and eX- reference designate corresponding parts through- JSendling iheYeihI'Ough iS a metallic Sleeve I4 25 out the several Vevvsy and wherein; Which, When the doors 2 and 3 are in CIOsed Figure 1 is a view in horizontal section through -DOSi'iOIL iS aligned With the barrel 6. As best a portion of a show case equipped with a lock in Seen in Fig- 6 0f the drawing, the Outer end D01-V accordance with the present invention. tiOn 0f the Sleeve i4 iS enlarged. as at l5.

Figure 2 is a View in front elevation, showing The barrel 5 iS OI the reception 0f a remov- 30 the plug in the barre1 with the key removed. Y able key plug which iS designated generally by Figure 3 is a view in rear elevation, Showing the reference numeral I 6. The plug I6 includes the plug mounted in the barreL a metallic cylinder Il' which is insertable in the Figure 4 is a view in front elevation of the bore l 0f the barrel, Seid Cylindel including a sleeve in the meeting rail of the innermost door flange i3 0n its Oilifel end DOIiiOn Which iS e11- 35 which receives the pin 0n the plug. gageable il). the COllIlteIbOIe 3 Of Said barrel. Figure 5 is a, View in rear elevation of the The reference numeral I9 designates tumblers sleeve shown in Fig. 4. which are mounted in the cylinder Il. The tum- Figure 6 is e, view Showing a pori-,ion of the blers I9 are retracted through the medium of a 4:0 Outer meeting rail Side elevation and a.Y por.. key WhlCh iS insertable the 'Cylinder tion of the inner meeting rail in vertical section from the Outer end thereof (See Flg- 3) The with the lock in operative position therein. o key 20. is ieleasably secured in the plug IB Figure 7 is a view in front elevation of the through the med-1um 0f a Spring pressed latch 01' barrer detent 2l (see Fig. 11) 1n the outer end portion Figure 8 is an elevational View of the plug with of the Cyhnder .n Whlch .1S ngageable m an 45 the key therein, the tumblers being retracted. gsga'iz i? 2131 g' 12) Whmh 1s provlded thereof I1 is a neck 23 which terminates in a segmental m Promoted Posltlonhead 24. The head 24 is engageable behind the 50 Figure 10 1S 'an eleVa'tlOnal VleW 0f the Plug, flanges I3 when the doors 2 and 3 are locked, the looklng at the lnnei" end t'flleieOienlarged portion I5 of the sleeve I4 accommodat- Figure 11 is a cross sectional View through the ing said head. Projecting from the head 24 is a outer end portion of the plug, taken substanpin 25 which is engageable in the sleeve I4. tially on the line Il-II oi Fig. 9. It is thought that the manner of using the lock 55 'i will be readily apparent from a consideration of the foregoing. As hereinbefore stated, when the doors 2 and 3 of the show case I are in closed position, the barrel 6 and the sleeve I 4 are aligned. To retract the tumblers I 9, the key 2U is inserted in the cylinder Il of the plug I 6. The plug I6,V

using the key 20 as a handle, is then inserted in the barrel 6 in such a position that the segmental head 24 thereon will pass between the anges I3 and enter the enlarged portion I5 of the sleeve I4, the pin 25 entering said sleeve I4. The plug I6 is then rotated to the position shown in Fig. 3

of the drawing to prevent withdrawal of the segmental head 24 between the ilangesI I3 and bring'v the tumblers I9 into registry with the grooves 9. The key 20 is then removed from the plug I6 and the tumblers IS engage in the grooves 9 for securing said plug against rotation in the barrel 6. It will thus be seen that the plug I6 is secured against both rotary and longitudinal movement in the barrel 6. With the pin 25 engaged in the sleeve I4 the doors 2 and 3 are, of course, locked together. The foregoing operation is substantially reversed to remove the plug I'I for unlocking the doors 2 and 3. The latch or detent 2I secures the,key 2U in the cylinder Il sulciently to permit said key to be used as a handle for withdrawing the plug I6 from the barrel 6.

It is believed that the many advantages of a.

lock constructed in accordance with the present invention will be readily understood and although a preferred embodiment of the device is as illustrated and described, it is to be understood that changes in the details of construction may be resorted to which will fall within the scope of the invention as claimed.

What is claimed is:-

A lock for a pair of sliding doors, comprising a plate secured on one of said doors, a barrel xed on said plate and extending through said one door, the plate having an opening therein aligned with the bore of the barrel, said bore of the barrel having longitudinal grooves therein, diametrically opposite flanges in the opening in the plate at one end of the grooves, a removable plugiinsertable in the barrel and including a cylinder, a neck on one end of said cylinder, a substantially segmental head on said neck adapted to pass between the flanges and engageable therebehind upon rotation of the cylinder for preventing withdrawal of said cylinder from the barrel, key operated tumblers mounted in the cylinder and engageable in the grooves for securing said cylinder against rotation in the barrel, and a pin projecting from the head and engageable in the other door for securing the doors together.

JAMES GORDON DUNSEATI-I. 

